<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width,initial-scale=1.0">
    <title>front_end</title>
  </head>
    <style>
    #id{
        position:relative absolute
    }
    .parent{
        width: 200px;
        height: 200px;
        /* background:#eee; */
        border:1px solid #000;
    }
    .kit{
        width:300px;
        height: 300px;
        /* background: red; */
        border:1px solid #000;
    }
  </style>
  
  <body>
    <div id="app"></div>
    <input type="button" value="修改"/>
    <div class="parent">
        <div class="kit"></div>
        <input type="text" value="hahah" disabled>
    </div>
    <!-- built files will be auto injected -->

    </body>
  </body>
</html>